InAs/AlAsSb based quantum cascade detector | Zendy

Peter Reininger | Zendy; Tobias Zederbauer | Zendy; Benedikt Schwarz | Zendy; Hermann Detz | Zendy; Donald MacFarland | Zendy; A. M. Andrews | Zendy; W. Schrenk | Zendy; G. Strasser | Zendy

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InAs/AlAsSb based quantum cascade detector

Author(s) -

Peter Reininger,

Tobias Zederbauer,

Benedikt Schwarz,

Hermann Detz,

Donald MacFarland,

A. M. Andrews,

W. Schrenk,

G. Strasser

Publication year - 2015

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4929501

Subject(s) - cascade , detector , optoelectronics , effective mass (spring–mass system) , wavelength , materials science , quantum , quantum efficiency , band gap , offset (computer science) , optics , physics , chemistry , chromatography , quantum mechanics , computer science , programming language

In this letter, we introduce the InAs/AlAsSb material system for quantum cascade detectors (QCDs). InAs/AlAsSb can be grown lattice matched to InAs and exhibits a conduction band offset of approximately 2.1 eV, enabling the design of very short wavelength quantum cascade detectors. Another benefit using this material system is the low effective mass of the well material that improves the total absorption of the detector and decreases the intersubband scattering rates, which increases the device resistance and thus enhances the noise behavior. We have designed, grown, and measured a QCD that detects at a wavelength of λ = 4.84 μm and shows a peak specific detectivity of approximately 2.7 × 107 Jones at T = 300 K.

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